【摘要】 以一组不同抗虫类型的陆地棉（Gossypium hirsutum L.）抗虫品种和一组常规棉（G.hirsutum L.）品种作为亲本,按照不完全双列杂交（NCⅡ）试验设计配制杂交组合,将亲本材料和 F₁代杂交种子按照随机区组设计方法,同时在网室和试验田进行棉花抗红铃虫（Pectinophora gossypiella Saunders）鉴定和棉花抗虫性对棉花纤维品质的影响试验。结果表明,具有外源抗虫基因的抗虫棉材料对红铃虫具有很强的抗性,抗虫棉的纤维品质较好,大多数抗虫棉品种达到了育种目标要求。相关分析结果表明,棉花种子虫害率与马克隆值成显著负相关;与衣指成显著正相关;与2.5%跨距长度、整齐度、比强度、伸长率和子指等指标相关性较低。利用外源抗虫基因转化的棉花新品种,用其作为亲本采用杂交育种法可以培育出优质的抗虫棉花新品种,而且提高棉花品种的抗虫性并不影响棉花纤维品质。更多还原

【Abstract】 A group of upland cotton （Gossypium hirsutum L.） varieties with different insect resistance backgrounds were crossed with a set of traditionally bred varieties following the way of North Carolina Ⅱ （NC Ⅱ） to produce hybrids and to evaluate the resistibility of the F₁ hybrids and the parental materials to pink bollworm （Pectinophora gossypiella Saunders）,and to test the effects of insect resistance on the fiber quality in accordance to the design of randomly grouped plots both in the trials of field and cage plots. The results showed that all the transgenic insect resistant varieties expressed a strong resistibility to pink bollworm and met the requirements for better fiber quality in the cotton breeding project.Correlation analysis revealed that the percentage of damaged seeds had a significant negative correlation with the micronaire and a significant positive correlation with the lint index,and did not show significant positive correlation with the 2.5% fiber spanlength,uniformity,strength,fiber elongation and the seed index.The results indicated that taking transgenic insect resistant varieties as parents could create cotton hybrids with strong insect resistibility and good fiber quality,and increasing the cotton insect resistibility by introduction of alien insect resistant genes did not affect the fiber quality.更多还原